sodium metasilicate

noun
sodium meta·sil·i·cate | \-ˌme-tə-ˈsi-lə-ˌkāt, -ˈsi-li-kət\

Definition of sodium metasilicate 

: a toxic corrosive crystalline salt Na2SiO3 used especially as a detergent or as a substitute for phosphates in detergent formulations

First Known Use of sodium metasilicate

circa 1926, in the meaning defined above

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The first known use of sodium metasilicate was circa 1926

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